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Old 11-18-2004, 08:07 AM   #1
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Registered: Nov 2004
Location: kolakaran pettai
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what is a socket file??

Hi all,

I was new to Linux...

I was not able to understand :

what is a socket file & symbolic links file?

what's the purpose of these 2 files?

Old 11-18-2004, 08:22 AM   #2
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
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a symbolic link is pretty much a "shortcut" like in windows, but unlike windows, these are real genuine parts of a vaild filesystem, not a silly little ".lnk" let's you access a single file from multiple locations. another kind of link that you can make with the "ln" command is a hard link. a hard link is where there are actually two entries in a file systems FAT table which go to the same memory location, as opposed to a symlink where one file points to another. with a hard link you can actually delete the original file, but as other links will remain, it is still available elsewhere. very handy

a socket file is used to pass information between applications amongst other applications. you may already be familiar with a pipe, "|" which lets you feed information directly, e.g. "ls | wc". Here, wc will count the number of lines from the output of ls. now a socket file is used when you can't join these two directly, and instead send the data to a special file. try this:
mkfifo /tmp/testfifo
tail -f /tmp/testfifo
and in another console
echo HELLO! > /tmp/testfifo
the tail command should say HELLO! to you. Think of it kinda like a wormhole or something. again useful when you really need to do it.
Old 11-18-2004, 08:43 AM   #3
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Thats great...
Thank You very much
Old 12-06-2004, 11:41 PM   #4
Registered: Nov 2004
Location: Earth
Distribution: Slackware 10, et ux
Posts: 36

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mkfifo creates a file of type "pipe" now, how do you create a file of type "socket"

btw, KDE's dangerous "change file type" changes all files associated not with the ending, or any thing else, but it changes all of the types on the entire machine!

This kde command needs fixin, bad!


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